That's just a hair smaller than stock. Cool.
I thought stock was a #70(.028) or so this chart says it should be bigger......
http://motorbicycling.com/attachments/f13/2554d1221495729-ht-main-jet-size-drill-size.jpg
Either way im running the needle clip on the 3rd slot from the bottom and that got rid of the WOT@idle bog, it also fixed the top end studder.
Question though...I wanted to go a step bigger what should I have gone with? Are the tables backwards or something?
The tables are in drill # size. Can't confuse that with Del Orto part #'s (which are in .XX mm). I'm running a part #65 which works great.
Stock is .70mm.
So youre running a 80mm? Im confused....the chart says the #68 is .78mm, is this wrong?
Indeed that is not correct. Your thinking is not right. "Designation" does NOT mean Del Orto part #'s. It means industrial number drill sizes. The table is for general usage and really just tells you drill bit equivalents, NOT Del Orto jet #'s.
Mine is a #65 which is .65mm. Your is a #68 which is .68mm. Stock is .70mm
This is NOT a bad thing. The thought is the these engines will run better (as you are seeing and feeling) by being slightly lean of stock. Good blind experiment!!
Either way im running the needle clip on the 3rd slot from the bottom and that got rid of the WOT@idle bog, it also fixed the top end studder.
?
Studders back again....I hate the stock carb on these things. Everyday my bike runs different and I have to make a adjustment to something. I dont get it, really, one day its great the next its crap. Another thing that bugs me is the sorry carb slide cap. It wont even stay tight without tape around it. I work on this thing more than I ride it, really.....I shoulda bought a scooter.![]()
That could be your problem. Carb slide cap. One time sucking air. Next time not...POPS
Where can I mail order one of them jets?
Just swapping the jet made a really big difference in the way the engine ran up top. I think a #65 with a lower clip positoin on the needle and itll run really great.
Lower clip position? In other words, moving the clip down one from stock or up one, because I've already moved the clip up one from the stock position, it runs better than it did, but I can still see some room for improvement. The motor almost seems like it's hesitating near the top end..like it wants to go faster but can't. I notice the bike feeling like it ever so slightly slows down then immediately tries to go faster. Not sure if that describes the "bucking" sensation that some people notice.........
Bucking as in studdering, you are gettin to much fuel in there. Id try finding another jet to put in the carb. My #68 works good but not great. Pablo swears by his #65, which is what im waiting on to arrive in the mail.
Ok, so what I've described accurately points to too much fuel? Where do I get the #65 jet?